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        <a href="../.." >算术运算符</a>
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                                <section class="normal markdown-section">
                                
                                <h1 id="&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;">&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;</h1>
<p>&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x5904;&#x7406;&#x6570;&#x636E;&#x7684;&#x57FA;&#x672C;&#x65B9;&#x6CD5;&#xFF0C;&#x7528;&#x6765;&#x4ECE;&#x73B0;&#x6709;&#x7684;&#x503C;&#x5F97;&#x5230;&#x65B0;&#x7684;&#x503C;&#x3002;JavaScript &#x63D0;&#x4F9B;&#x4E86;&#x591A;&#x79CD;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8986;&#x76D6;&#x4E86;&#x6240;&#x6709;&#x4E3B;&#x8981;&#x7684;&#x8FD0;&#x7B97;&#x3002;</p>
<h2 id="&#x6982;&#x8FF0;">&#x6982;&#x8FF0;</h2>
<p>JavaScript &#x5171;&#x63D0;&#x4F9B;10&#x4E2A;&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x7528;&#x6765;&#x5B8C;&#x6210;&#x57FA;&#x672C;&#x7684;&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x3002;</p>
<ul>
<li><strong>&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>x + y</code></li>
<li><strong>&#x51CF;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A; <code>x - y</code></li>
<li><strong>&#x4E58;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A; <code>x * y</code></li>
<li><strong>&#x9664;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>x / y</code></li>
<li><strong>&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>x ** y</code></li>
<li><strong>&#x4F59;&#x6570;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>x % y</code></li>
<li><strong>&#x81EA;&#x589E;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>++x</code> &#x6216;&#x8005; <code>x++</code></li>
<li><strong>&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>--x</code> &#x6216;&#x8005; <code>x--</code></li>
<li><strong>&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A; <code>+x</code></li>
<li><strong>&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;</strong>&#xFF1A;<code>-x</code></li>
</ul>
<p>&#x51CF;&#x6CD5;&#x3001;&#x4E58;&#x6CD5;&#x3001;&#x9664;&#x6CD5;&#x8FD0;&#x7B97;&#x6CD5;&#x6BD4;&#x8F83;&#x5355;&#x7EAF;&#xFF0C;&#x5C31;&#x662F;&#x6267;&#x884C;&#x76F8;&#x5E94;&#x7684;&#x6570;&#x5B66;&#x8FD0;&#x7B97;&#x3002;&#x4E0B;&#x9762;&#x4ECB;&#x7ECD;&#x5176;&#x4ED6;&#x51E0;&#x4E2A;&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x91CD;&#x70B9;&#x662F;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x3002;</p>
<h2 id="&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;">&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;</h2>
<h3 id="&#x57FA;&#x672C;&#x89C4;&#x5219;">&#x57FA;&#x672C;&#x89C4;&#x5219;</h3>
<p>&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;<code>+</code>&#xFF09;&#x662F;&#x6700;&#x5E38;&#x89C1;&#x7684;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x7528;&#x6765;&#x6C42;&#x4E24;&#x4E2A;&#x6570;&#x503C;&#x7684;&#x548C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">1</span> + <span class="hljs-number">1</span> <span class="hljs-comment">// 2</span>
</code></pre>
<p>JavaScript &#x5141;&#x8BB8;&#x975E;&#x6570;&#x503C;&#x7684;&#x76F8;&#x52A0;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-literal">true</span> + <span class="hljs-literal">true</span> <span class="hljs-comment">// 2</span>
<span class="hljs-number">1</span> + <span class="hljs-literal">true</span> <span class="hljs-comment">// 2</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x7B2C;&#x4E00;&#x884C;&#x662F;&#x4E24;&#x4E2A;&#x5E03;&#x5C14;&#x503C;&#x76F8;&#x52A0;&#xFF0C;&#x7B2C;&#x4E8C;&#x884C;&#x662F;&#x6570;&#x503C;&#x4E0E;&#x5E03;&#x5C14;&#x503C;&#x76F8;&#x52A0;&#x3002;&#x8FD9;&#x4E24;&#x79CD;&#x60C5;&#x51B5;&#xFF0C;&#x5E03;&#x5C14;&#x503C;&#x90FD;&#x4F1A;&#x81EA;&#x52A8;&#x8F6C;&#x6210;&#x6570;&#x503C;&#xFF0C;&#x7136;&#x540E;&#x518D;&#x76F8;&#x52A0;&#x3002;</p>
<p>&#x6BD4;&#x8F83;&#x7279;&#x6B8A;&#x7684;&#x662F;&#xFF0C;&#x5982;&#x679C;&#x662F;&#x4E24;&#x4E2A;&#x5B57;&#x7B26;&#x4E32;&#x76F8;&#x52A0;&#xFF0C;&#x8FD9;&#x65F6;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x4F1A;&#x53D8;&#x6210;&#x8FDE;&#x63A5;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5C06;&#x4E24;&#x4E2A;&#x539F;&#x5B57;&#x7B26;&#x4E32;&#x8FDE;&#x63A5;&#x5728;&#x4E00;&#x8D77;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-string">&apos;a&apos;</span> + <span class="hljs-string">&apos;bc&apos;</span> <span class="hljs-comment">// &quot;abc&quot;</span>
</code></pre>
<p>&#x5982;&#x679C;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x53E6;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x975E;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x8FD9;&#x65F6;&#x975E;&#x5B57;&#x7B26;&#x4E32;&#x4F1A;&#x8F6C;&#x6210;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x518D;&#x8FDE;&#x63A5;&#x5728;&#x4E00;&#x8D77;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">1</span> + <span class="hljs-string">&apos;a&apos;</span> <span class="hljs-comment">// &quot;1a&quot;</span>
<span class="hljs-literal">false</span> + <span class="hljs-string">&apos;a&apos;</span> <span class="hljs-comment">// &quot;falsea&quot;</span>
</code></pre>
<p>&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x5728;&#x8FD0;&#x884C;&#x65F6;&#x51B3;&#x5B9A;&#xFF0C;&#x5230;&#x5E95;&#x662F;&#x6267;&#x884C;&#x76F8;&#x52A0;&#xFF0C;&#x8FD8;&#x662F;&#x6267;&#x884C;&#x8FDE;&#x63A5;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x8FD0;&#x7B97;&#x5B50;&#x7684;&#x4E0D;&#x540C;&#xFF0C;&#x5BFC;&#x81F4;&#x4E86;&#x4E0D;&#x540C;&#x7684;&#x8BED;&#x6CD5;&#x884C;&#x4E3A;&#xFF0C;&#x8FD9;&#x79CD;&#x73B0;&#x8C61;&#x79F0;&#x4E3A;&#x201C;&#x91CD;&#x8F7D;&#x201D;&#xFF08;overload&#xFF09;&#x3002;&#x7531;&#x4E8E;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x5B58;&#x5728;&#x91CD;&#x8F7D;&#xFF0C;&#x53EF;&#x80FD;&#x6267;&#x884C;&#x4E24;&#x79CD;&#x8FD0;&#x7B97;&#xFF0C;&#x4F7F;&#x7528;&#x7684;&#x65F6;&#x5019;&#x5FC5;&#x987B;&#x5F88;&#x5C0F;&#x5FC3;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-string">&apos;3&apos;</span> + <span class="hljs-number">4</span> + <span class="hljs-number">5</span> <span class="hljs-comment">// &quot;345&quot;</span>
<span class="hljs-number">3</span> + <span class="hljs-number">4</span> + <span class="hljs-string">&apos;5&apos;</span> <span class="hljs-comment">// &quot;75&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x7531;&#x4E8E;&#x4ECE;&#x5DE6;&#x5230;&#x53F3;&#x7684;&#x8FD0;&#x7B97;&#x6B21;&#x5E8F;&#xFF0C;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x4F4D;&#x7F6E;&#x4E0D;&#x540C;&#x4F1A;&#x5BFC;&#x81F4;&#x4E0D;&#x540C;&#x7684;&#x7ED3;&#x679C;&#x3002;</p>
<p>&#x9664;&#x4E86;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x5176;&#x4ED6;&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;&#x6BD4;&#x5982;&#x51CF;&#x6CD5;&#x3001;&#x9664;&#x6CD5;&#x548C;&#x4E58;&#x6CD5;&#xFF09;&#x90FD;&#x4E0D;&#x4F1A;&#x53D1;&#x751F;&#x91CD;&#x8F7D;&#x3002;&#x5B83;&#x4EEC;&#x7684;&#x89C4;&#x5219;&#x662F;&#xFF1A;&#x6240;&#x6709;&#x8FD0;&#x7B97;&#x5B50;&#x4E00;&#x5F8B;&#x8F6C;&#x4E3A;&#x6570;&#x503C;&#xFF0C;&#x518D;&#x8FDB;&#x884C;&#x76F8;&#x5E94;&#x7684;&#x6570;&#x5B66;&#x8FD0;&#x7B97;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">1</span> - <span class="hljs-string">&apos;2&apos;</span> <span class="hljs-comment">// -1</span>
<span class="hljs-number">1</span> * <span class="hljs-string">&apos;2&apos;</span> <span class="hljs-comment">// 2</span>
<span class="hljs-number">1</span> / <span class="hljs-string">&apos;2&apos;</span> <span class="hljs-comment">// 0.5</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x51CF;&#x6CD5;&#x3001;&#x9664;&#x6CD5;&#x548C;&#x4E58;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x90FD;&#x662F;&#x5C06;&#x5B57;&#x7B26;&#x4E32;&#x81EA;&#x52A8;&#x8F6C;&#x4E3A;&#x6570;&#x503C;&#xFF0C;&#x7136;&#x540E;&#x518D;&#x8FD0;&#x7B97;&#x3002;</p>
<h3 id="&#x5BF9;&#x8C61;&#x7684;&#x76F8;&#x52A0;">&#x5BF9;&#x8C61;&#x7684;&#x76F8;&#x52A0;</h3>
<p>&#x5982;&#x679C;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x5BF9;&#x8C61;&#xFF0C;&#x5FC5;&#x987B;&#x5148;&#x8F6C;&#x6210;&#x539F;&#x59CB;&#x7C7B;&#x578B;&#x7684;&#x503C;&#xFF0C;&#x7136;&#x540E;&#x518D;&#x76F8;&#x52A0;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = { p: <span class="hljs-number">1</span> };
obj + <span class="hljs-number">2</span> <span class="hljs-comment">// &quot;[object Object]2&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x5BF9;&#x8C61;<code>obj</code>&#x8F6C;&#x6210;&#x539F;&#x59CB;&#x7C7B;&#x578B;&#x7684;&#x503C;&#x662F;<code>[object Object]</code>&#xFF0C;&#x518D;&#x52A0;<code>2</code>&#x5C31;&#x5F97;&#x5230;&#x4E86;&#x4E0A;&#x9762;&#x7684;&#x7ED3;&#x679C;&#x3002;</p>
<p>&#x5BF9;&#x8C61;&#x8F6C;&#x6210;&#x539F;&#x59CB;&#x7C7B;&#x578B;&#x7684;&#x503C;&#xFF0C;&#x89C4;&#x5219;&#x5982;&#x4E0B;&#x3002;</p>
<p>&#x9996;&#x5148;&#xFF0C;&#x81EA;&#x52A8;&#x8C03;&#x7528;&#x5BF9;&#x8C61;&#x7684;<code>valueOf</code>&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = { p: <span class="hljs-number">1</span> };
obj.valueOf() <span class="hljs-comment">// { p: 1 }</span>
</code></pre>
<p>&#x4E00;&#x822C;&#x6765;&#x8BF4;&#xFF0C;&#x5BF9;&#x8C61;&#x7684;<code>valueOf</code>&#x65B9;&#x6CD5;&#x603B;&#x662F;&#x8FD4;&#x56DE;&#x5BF9;&#x8C61;&#x81EA;&#x8EAB;&#xFF0C;&#x8FD9;&#x65F6;&#x518D;&#x81EA;&#x52A8;&#x8C03;&#x7528;&#x5BF9;&#x8C61;&#x7684;<code>toString</code>&#x65B9;&#x6CD5;&#xFF0C;&#x5C06;&#x5176;&#x8F6C;&#x4E3A;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = { p: <span class="hljs-number">1</span> };
obj.valueOf().toString() <span class="hljs-comment">// &quot;[object Object]&quot;</span>
</code></pre>
<p>&#x5BF9;&#x8C61;&#x7684;<code>toString</code>&#x65B9;&#x6CD5;&#x9ED8;&#x8BA4;&#x8FD4;&#x56DE;<code>[object Object]</code>&#xFF0C;&#x6240;&#x4EE5;&#x5C31;&#x5F97;&#x5230;&#x4E86;&#x6700;&#x524D;&#x9762;&#x90A3;&#x4E2A;&#x4F8B;&#x5B50;&#x7684;&#x7ED3;&#x679C;&#x3002;</p>
<p>&#x77E5;&#x9053;&#x4E86;&#x8FD9;&#x4E2A;&#x89C4;&#x5219;&#x4EE5;&#x540E;&#xFF0C;&#x5C31;&#x53EF;&#x4EE5;&#x81EA;&#x5DF1;&#x5B9A;&#x4E49;<code>valueOf</code>&#x65B9;&#x6CD5;&#x6216;<code>toString</code>&#x65B9;&#x6CD5;&#xFF0C;&#x5F97;&#x5230;&#x60F3;&#x8981;&#x7684;&#x7ED3;&#x679C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = {
  valueOf: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> <span class="hljs-number">1</span>;
  }
};

obj + <span class="hljs-number">2</span> <span class="hljs-comment">// 3</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x6211;&#x4EEC;&#x5B9A;&#x4E49;<code>obj</code>&#x5BF9;&#x8C61;&#x7684;<code>valueOf</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;<code>1</code>&#xFF0C;&#x4E8E;&#x662F;<code>obj + 2</code>&#x5C31;&#x5F97;&#x5230;&#x4E86;<code>3</code>&#x3002;&#x8FD9;&#x4E2A;&#x4F8B;&#x5B50;&#x4E2D;&#xFF0C;&#x7531;&#x4E8E;<code>valueOf</code>&#x65B9;&#x6CD5;&#x76F4;&#x63A5;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x539F;&#x59CB;&#x7C7B;&#x578B;&#x7684;&#x503C;&#xFF0C;&#x6240;&#x4EE5;&#x4E0D;&#x518D;&#x8C03;&#x7528;<code>toString</code>&#x65B9;&#x6CD5;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x662F;&#x81EA;&#x5B9A;&#x4E49;<code>toString</code>&#x65B9;&#x6CD5;&#x7684;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = {
  toString: <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
    <span class="hljs-keyword">return</span> <span class="hljs-string">&apos;hello&apos;</span>;
  }
};

obj + <span class="hljs-number">2</span> <span class="hljs-comment">// &quot;hello2&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x5BF9;&#x8C61;<code>obj</code>&#x7684;<code>toString</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5B57;&#x7B26;&#x4E32;<code>hello</code>&#x3002;&#x524D;&#x9762;&#x8BF4;&#x8FC7;&#xFF0C;&#x53EA;&#x8981;&#x6709;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x5C31;&#x53D8;&#x6210;&#x8FDE;&#x63A5;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8FD4;&#x56DE;&#x8FDE;&#x63A5;&#x540E;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<p>&#x8FD9;&#x91CC;&#x6709;&#x4E00;&#x4E2A;&#x7279;&#x4F8B;&#xFF0C;&#x5982;&#x679C;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x4E00;&#x4E2A;<code>Date</code>&#x5BF9;&#x8C61;&#x7684;&#x5B9E;&#x4F8B;&#xFF0C;&#x90A3;&#x4E48;&#x4F1A;&#x4F18;&#x5148;&#x6267;&#x884C;<code>toString</code>&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> obj = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();
obj.valueOf = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{ <span class="hljs-keyword">return</span> <span class="hljs-number">1</span> };
obj.toString = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{ <span class="hljs-keyword">return</span> <span class="hljs-string">&apos;hello&apos;</span> };

obj + <span class="hljs-number">2</span> <span class="hljs-comment">// &quot;hello2&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x5BF9;&#x8C61;<code>obj</code>&#x662F;&#x4E00;&#x4E2A;<code>Date</code>&#x5BF9;&#x8C61;&#x7684;&#x5B9E;&#x4F8B;&#xFF0C;&#x5E76;&#x4E14;&#x81EA;&#x5B9A;&#x4E49;&#x4E86;<code>valueOf</code>&#x65B9;&#x6CD5;&#x548C;<code>toString</code>&#x65B9;&#x6CD5;&#xFF0C;&#x7ED3;&#x679C;<code>toString</code>&#x65B9;&#x6CD5;&#x4F18;&#x5148;&#x6267;&#x884C;&#x3002;</p>
<h2 id="&#x4F59;&#x6570;&#x8FD0;&#x7B97;&#x7B26;">&#x4F59;&#x6570;&#x8FD0;&#x7B97;&#x7B26;</h2>
<p>&#x4F59;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;<code>%</code>&#xFF09;&#x8FD4;&#x56DE;&#x524D;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x88AB;&#x540E;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x9664;&#xFF0C;&#x6240;&#x5F97;&#x7684;&#x4F59;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">12</span> % <span class="hljs-number">5</span> <span class="hljs-comment">// 2</span>
</code></pre>
<p>&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x662F;&#xFF0C;&#x8FD0;&#x7B97;&#x7ED3;&#x679C;&#x7684;&#x6B63;&#x8D1F;&#x53F7;&#x7531;&#x7B2C;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x7684;&#x6B63;&#x8D1F;&#x53F7;&#x51B3;&#x5B9A;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">-1</span> % <span class="hljs-number">2</span> <span class="hljs-comment">// -1</span>
<span class="hljs-number">1</span> % <span class="hljs-number">-2</span> <span class="hljs-comment">// 1</span>
</code></pre>
<p>&#x6240;&#x4EE5;&#xFF0C;&#x4E3A;&#x4E86;&#x5F97;&#x5230;&#x8D1F;&#x6570;&#x7684;&#x6B63;&#x786E;&#x4F59;&#x6570;&#x503C;&#xFF0C;&#x53EF;&#x4EE5;&#x5148;&#x4F7F;&#x7528;&#x7EDD;&#x5BF9;&#x503C;&#x51FD;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x9519;&#x8BEF;&#x7684;&#x5199;&#x6CD5;</span>
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">isOdd</span>(<span class="hljs-params">n</span>) </span>{
  <span class="hljs-keyword">return</span> n % <span class="hljs-number">2</span> === <span class="hljs-number">1</span>;
}
isOdd(<span class="hljs-number">-5</span>) <span class="hljs-comment">// false</span>
isOdd(<span class="hljs-number">-4</span>) <span class="hljs-comment">// false</span>

<span class="hljs-comment">// &#x6B63;&#x786E;&#x7684;&#x5199;&#x6CD5;</span>
<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">isOdd</span>(<span class="hljs-params">n</span>) </span>{
  <span class="hljs-keyword">return</span> <span class="hljs-built_in">Math</span>.abs(n % <span class="hljs-number">2</span>) === <span class="hljs-number">1</span>;
}
isOdd(<span class="hljs-number">-5</span>) <span class="hljs-comment">// true</span>
isOdd(<span class="hljs-number">-4</span>) <span class="hljs-comment">// false</span>
</code></pre>
<p>&#x4F59;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#x8FD8;&#x53EF;&#x4EE5;&#x7528;&#x4E8E;&#x6D6E;&#x70B9;&#x6570;&#x7684;&#x8FD0;&#x7B97;&#x3002;&#x4F46;&#x662F;&#xFF0C;&#x7531;&#x4E8E;&#x6D6E;&#x70B9;&#x6570;&#x4E0D;&#x662F;&#x7CBE;&#x786E;&#x7684;&#x503C;&#xFF0C;&#x65E0;&#x6CD5;&#x5F97;&#x5230;&#x5B8C;&#x5168;&#x51C6;&#x786E;&#x7684;&#x7ED3;&#x679C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">6.5</span> % <span class="hljs-number">2.1</span>
<span class="hljs-comment">// 0.19999999999999973</span>
</code></pre>
<h2 id="&#x81EA;&#x589E;&#x548C;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;">&#x81EA;&#x589E;&#x548C;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;</h2>
<p>&#x81EA;&#x589E;&#x548C;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x662F;&#x4E00;&#x5143;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x53EA;&#x9700;&#x8981;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x3002;&#x5B83;&#x4EEC;&#x7684;&#x4F5C;&#x7528;&#x662F;&#x5C06;&#x8FD0;&#x7B97;&#x5B50;&#x9996;&#x5148;&#x8F6C;&#x4E3A;&#x6570;&#x503C;&#xFF0C;&#x7136;&#x540E;&#x52A0;&#x4E0A;1&#x6216;&#x8005;&#x51CF;&#x53BB;1&#x3002;&#x5B83;&#x4EEC;&#x4F1A;&#x4FEE;&#x6539;&#x539F;&#x59CB;&#x53D8;&#x91CF;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> x = <span class="hljs-number">1</span>;
++x <span class="hljs-comment">// 2</span>
x <span class="hljs-comment">// 2</span>

--x <span class="hljs-comment">// 1</span>
x <span class="hljs-comment">// 1</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x7684;&#x53D8;&#x91CF;<code>x</code>&#x81EA;&#x589E;&#x540E;&#xFF0C;&#x8FD4;&#x56DE;<code>2</code>&#xFF0C;&#x518D;&#x8FDB;&#x884C;&#x81EA;&#x51CF;&#xFF0C;&#x8FD4;&#x56DE;<code>1</code>&#x3002;&#x8FD9;&#x4E24;&#x79CD;&#x60C5;&#x51B5;&#x90FD;&#x4F1A;&#x4F7F;&#x5F97;&#xFF0C;&#x539F;&#x59CB;&#x53D8;&#x91CF;<code>x</code>&#x7684;&#x503C;&#x53D1;&#x751F;&#x6539;&#x53D8;&#x3002;</p>
<p>&#x8FD0;&#x7B97;&#x4E4B;&#x540E;&#xFF0C;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x53D1;&#x751F;&#x53D8;&#x5316;&#xFF0C;&#x8FD9;&#x79CD;&#x6548;&#x5E94;&#x53EB;&#x505A;&#x8FD0;&#x7B97;&#x7684;&#x526F;&#x4F5C;&#x7528;&#xFF08;side effect&#xFF09;&#x3002;&#x81EA;&#x589E;&#x548C;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x4EC5;&#x6709;&#x7684;&#x4E24;&#x4E2A;&#x5177;&#x6709;&#x526F;&#x4F5C;&#x7528;&#x7684;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x5176;&#x4ED6;&#x8FD0;&#x7B97;&#x7B26;&#x90FD;&#x4E0D;&#x4F1A;&#x6539;&#x53D8;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x3002;</p>
<p>&#x81EA;&#x589E;&#x548C;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;&#x6709;&#x4E00;&#x4E2A;&#x9700;&#x8981;&#x6CE8;&#x610F;&#x7684;&#x5730;&#x65B9;&#xFF0C;&#x5C31;&#x662F;&#x653E;&#x5728;&#x53D8;&#x91CF;&#x4E4B;&#x540E;&#xFF0C;&#x4F1A;&#x5148;&#x8FD4;&#x56DE;&#x53D8;&#x91CF;&#x64CD;&#x4F5C;&#x524D;&#x7684;&#x503C;&#xFF0C;&#x518D;&#x8FDB;&#x884C;&#x81EA;&#x589E;/&#x81EA;&#x51CF;&#x64CD;&#x4F5C;&#xFF1B;&#x653E;&#x5728;&#x53D8;&#x91CF;&#x4E4B;&#x524D;&#xFF0C;&#x4F1A;&#x5148;&#x8FDB;&#x884C;&#x81EA;&#x589E;/&#x81EA;&#x51CF;&#x64CD;&#x4F5C;&#xFF0C;&#x518D;&#x8FD4;&#x56DE;&#x53D8;&#x91CF;&#x64CD;&#x4F5C;&#x540E;&#x7684;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> x = <span class="hljs-number">1</span>;
<span class="hljs-keyword">var</span> y = <span class="hljs-number">1</span>;

x++ <span class="hljs-comment">// 1</span>
++y <span class="hljs-comment">// 2</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>x</code>&#x662F;&#x5148;&#x8FD4;&#x56DE;&#x5F53;&#x524D;&#x503C;&#xFF0C;&#x7136;&#x540E;&#x81EA;&#x589E;&#xFF0C;&#x6240;&#x4EE5;&#x5F97;&#x5230;<code>1</code>&#xFF1B;<code>y</code>&#x662F;&#x5148;&#x81EA;&#x589E;&#xFF0C;&#x7136;&#x540E;&#x8FD4;&#x56DE;&#x65B0;&#x7684;&#x503C;&#xFF0C;&#x6240;&#x4EE5;&#x5F97;&#x5230;<code>2</code>&#x3002;</p>
<h2 id="&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;">&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;</h2>
<p>&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;<code>+</code>&#xFF09;&#x540C;&#x6837;&#x4F7F;&#x7528;&#x52A0;&#x53F7;&#xFF0C;&#x4F46;&#x5B83;&#x662F;&#x4E00;&#x5143;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;&#x53EA;&#x9700;&#x8981;&#x4E00;&#x4E2A;&#x64CD;&#x4F5C;&#x6570;&#xFF09;&#xFF0C;&#x800C;&#x52A0;&#x6CD5;&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x4E8C;&#x5143;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;&#x9700;&#x8981;&#x4E24;&#x4E2A;&#x64CD;&#x4F5C;&#x6570;&#xFF09;&#x3002;</p>
<p>&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#x7684;&#x4F5C;&#x7528;&#x5728;&#x4E8E;&#x53EF;&#x4EE5;&#x5C06;&#x4EFB;&#x4F55;&#x503C;&#x8F6C;&#x4E3A;&#x6570;&#x503C;&#xFF08;&#x4E0E;<code>Number</code>&#x51FD;&#x6570;&#x7684;&#x4F5C;&#x7528;&#x76F8;&#x540C;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript">+<span class="hljs-literal">true</span> <span class="hljs-comment">// 1</span>
+[] <span class="hljs-comment">// 0</span>
+{} <span class="hljs-comment">// NaN</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x8868;&#x793A;&#xFF0C;&#x975E;&#x6570;&#x503C;&#x7ECF;&#x8FC7;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#x4EE5;&#x540E;&#xFF0C;&#x90FD;&#x53D8;&#x6210;&#x4E86;&#x6570;&#x503C;&#xFF08;&#x6700;&#x540E;&#x4E00;&#x884C;<code>NaN</code>&#x4E5F;&#x662F;&#x6570;&#x503C;&#xFF09;&#x3002;&#x5177;&#x4F53;&#x7684;&#x7C7B;&#x578B;&#x8F6C;&#x6362;&#x89C4;&#x5219;&#xFF0C;&#x53C2;&#x89C1;&#x300A;&#x6570;&#x636E;&#x7C7B;&#x578B;&#x8F6C;&#x6362;&#x300B;&#x4E00;&#x7AE0;&#x3002;</p>
<p>&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;<code>-</code>&#xFF09;&#xFF0C;&#x4E5F;&#x540C;&#x6837;&#x5177;&#x6709;&#x5C06;&#x4E00;&#x4E2A;&#x503C;&#x8F6C;&#x4E3A;&#x6570;&#x503C;&#x7684;&#x529F;&#x80FD;&#xFF0C;&#x53EA;&#x4E0D;&#x8FC7;&#x5F97;&#x5230;&#x7684;&#x503C;&#x6B63;&#x8D1F;&#x76F8;&#x53CD;&#x3002;&#x8FDE;&#x7528;&#x4E24;&#x4E2A;&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x7B49;&#x540C;&#x4E8E;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> x = <span class="hljs-number">1</span>;
-x <span class="hljs-comment">// -1</span>
-(-x) <span class="hljs-comment">// 1</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x6700;&#x540E;&#x4E00;&#x884C;&#x7684;&#x5706;&#x62EC;&#x53F7;&#x4E0D;&#x53EF;&#x5C11;&#xFF0C;&#x5426;&#x5219;&#x4F1A;&#x53D8;&#x6210;&#x81EA;&#x51CF;&#x8FD0;&#x7B97;&#x7B26;&#x3002;</p>
<p>&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#x53F7;&#x548C;&#x8D1F;&#x6570;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x90FD;&#x4F1A;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x65B0;&#x7684;&#x503C;&#xFF0C;&#x800C;&#x4E0D;&#x4F1A;&#x6539;&#x53D8;&#x539F;&#x59CB;&#x53D8;&#x91CF;&#x7684;&#x503C;&#x3002;</p>
<h2 id="&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;">&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;</h2>
<p>&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;<code>**</code>&#xFF09;&#x5B8C;&#x6210;&#x6307;&#x6570;&#x8FD0;&#x7B97;&#xFF0C;&#x524D;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x5E95;&#x6570;&#xFF0C;&#x540E;&#x4E00;&#x4E2A;&#x8FD0;&#x7B97;&#x5B50;&#x662F;&#x6307;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-number">2</span> ** <span class="hljs-number">4</span> <span class="hljs-comment">// 16</span>
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x53F3;&#x7ED3;&#x5408;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x5DE6;&#x7ED3;&#x5408;&#x3002;&#x5373;&#x591A;&#x4E2A;&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#x8FDE;&#x7528;&#x65F6;&#xFF0C;&#x5148;&#x8FDB;&#x884C;&#x6700;&#x53F3;&#x8FB9;&#x7684;&#x8BA1;&#x7B97;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x76F8;&#x5F53;&#x4E8E; 2 ** (3 ** 2)</span>
<span class="hljs-number">2</span> ** <span class="hljs-number">3</span> ** <span class="hljs-number">2</span>
<span class="hljs-comment">// 512</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x7531;&#x4E8E;&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#x662F;&#x53F3;&#x7ED3;&#x5408;&#xFF0C;&#x6240;&#x4EE5;&#x5148;&#x8BA1;&#x7B97;&#x7B2C;&#x4E8C;&#x4E2A;&#x6307;&#x6570;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x800C;&#x4E0D;&#x662F;&#x7B2C;&#x4E00;&#x4E2A;&#x3002;</p>
<h2 id="&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;">&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;</h2>
<p>&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF08;Assignment Operators&#xFF09;&#x7528;&#x4E8E;&#x7ED9;&#x53D8;&#x91CF;&#x8D4B;&#x503C;&#x3002;</p>
<p>&#x6700;&#x5E38;&#x89C1;&#x7684;&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x5F53;&#x7136;&#x5C31;&#x662F;&#x7B49;&#x53F7;&#xFF08;<code>=</code>&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x5C06; 1 &#x8D4B;&#x503C;&#x7ED9;&#x53D8;&#x91CF; x</span>
<span class="hljs-keyword">var</span> x = <span class="hljs-number">1</span>;

<span class="hljs-comment">// &#x5C06;&#x53D8;&#x91CF; y &#x7684;&#x503C;&#x8D4B;&#x503C;&#x7ED9;&#x53D8;&#x91CF; x</span>
<span class="hljs-keyword">var</span> x = y;
</code></pre>
<p>&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#x8FD8;&#x53EF;&#x4EE5;&#x4E0E;&#x5176;&#x4ED6;&#x8FD0;&#x7B97;&#x7B26;&#x7ED3;&#x5408;&#xFF0C;&#x5F62;&#x6210;&#x53D8;&#x4F53;&#x3002;&#x4E0B;&#x9762;&#x662F;&#x4E0E;&#x7B97;&#x672F;&#x8FD0;&#x7B97;&#x7B26;&#x7684;&#x7ED3;&#x5408;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x + y</span>
x += y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x - y</span>
x -= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x * y</span>
x *= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x / y</span>
x /= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x % y</span>
x %= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x ** y</span>
x **= y
</code></pre>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E0E;&#x4F4D;&#x8FD0;&#x7B97;&#x7B26;&#x7684;&#x7ED3;&#x5408;&#xFF08;&#x5173;&#x4E8E;&#x4F4D;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x8BF7;&#x89C1;&#x540E;&#x6587;&#x7684;&#x4ECB;&#x7ECD;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x &gt;&gt; y</span>
x &gt;&gt;= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x &lt;&lt; y</span>
x &lt;&lt;= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x &gt;&gt;&gt; y</span>
x &gt;&gt;&gt;= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x &amp; y</span>
x &amp;= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x | y</span>
x |= y

<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E; x = x ^ y</span>
x ^= y
</code></pre>
<p>&#x8FD9;&#x4E9B;&#x590D;&#x5408;&#x7684;&#x8D4B;&#x503C;&#x8FD0;&#x7B97;&#x7B26;&#xFF0C;&#x90FD;&#x662F;&#x5148;&#x8FDB;&#x884C;&#x6307;&#x5B9A;&#x8FD0;&#x7B97;&#xFF0C;&#x7136;&#x540E;&#x5C06;&#x5F97;&#x5230;&#x503C;&#x8FD4;&#x56DE;&#x7ED9;&#x5DE6;&#x8FB9;&#x7684;&#x53D8;&#x91CF;&#x3002;</p>




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